1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 362Get this manual
Loosen adjustment nuts and pull steering cable mounting tube (by hand) away from end of steering cable (to remove slack in steering system)Tighten adjustment nuts against mounting bracket and check system for slack (play)If steering system is too tight, readjust tube toward end of steering cable or, if too much slack (play) exists in system, readjust tube away from end of steering cableTighten nuts against mounting bracket and readjust, if necessary Install rubber bumpers (a) on inside of each locking sleeve (b)
Install locking sleeves over steering cable attaching nuts and secure with cotter pinsSpread ends of cotter pinsBe sure to install cotter pin so that it is located in between attaching nut and grease fitting
16961Steering Cable Mounting TubeAdjustment NutsAdjust Tube in This Direction to Remove Slack from Steering SystemdAdjust Tube in This Direction to Reduce Tension from Steering System